#1152 Resolves issue where patch groups were not being properly formatted when uploading to broadcastify calls api. (#1153)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/identifier/patch/PatchGroupManager.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2019 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2022 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,7 +14,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.identifier.patch;
@@ -46,10 +45,22 @@ public class PatchGroupManager
     private Map<Integer,Long> mPatchGroupLastUpdatedMap = new HashMap<>();
     private Map<Integer,PatchGroupIdentifier> mPatchGroupMap = new HashMap<>();
 
+    /**
+     * Constructs an instance
+     */
     public PatchGroupManager()
     {
     }
 
+    /**
+     * Clears any existing patch groups
+     */
+    public void clear()
+    {
+        mPatchGroupMap.clear();
+        mPatchGroupLastUpdatedMap.clear();
+    }
+
     /**
      * Adds the patch group identifier to the set of managed patch groups.  If the patch group is already being
      * managed, the new identifier is checked for additional patched talkgroups and they are added to the existing